-2521
domain: Z
Appears in sequences
- G.f.: -(1-3*x^2-x^3)/(1+4*x-4*x^3-x^4).at n=6A097948
- a(n,m) =Floor[N[(-2 + Sqrt[3])^n + (-2 - Sqrt[3])^n]/2^m].at n=22A117809
- Triangle T(n,k) read by rows: the coefficient [x^k] of the polynomial Product_{i=1..n} (i+1)*x-i in row n>=0 and column 0<=k<=n.at n=17A142070
- 2*n^3 - 313*n^2 + 6823*n - 13633.at n=24A218456
- E.g.f.: Product_{m>=0} exp(-x^(4*m+1)).at n=7A293566
- Expansion of Product_{k>=1} (1 - (x/(1+x))^k).at n=14A307548
- Expansion of Product_{k>=1} (1 - x^k/(1 - x)).at n=31A307599